From: pkang@acsu.buffalo.edu (Pablo Kang)

  The song starts out with F#.

  After that, you hear that part where he starts hammering on the
  guitar. The chord progression is:

    A -> D -> G  (2X)

  Then:

    Bm -> G -> A (-> D? I forget)

  During the bridge, there's a change of key.

  The progression starts with F#.

  I can't remember everything, but I'll post the whole thing when I
  have time. Hope the chords will help you out a bit though. 
  (By the way, Marr definitally only uses bar chords)

pablo